Enter the Oxygen Reduction Potential and the conversion factor into the calculator to determine the concentration in parts per million. This calculator can also evaluate any of the variables given the others are known.

Orp To Ppm Formula

The following formula is used to calculate the conversion from Oxygen Reduction Potential (ORP) to Parts Per Million (PPM).



  • PPM is the concentration in parts per million ORP is the Oxygen Reduction Potential (mV) K is the conversion factor (mV/PPM)

To calculate the concentration in parts per million, divide the Oxygen Reduction Potential by the conversion factor. The conversion factor may vary depending on the specific context or substance being measured.

What is Orp To Ppm?

ORP (Oxidation Reduction Potential) to PPM (Parts Per Million) is a conversion used in water treatment processes. ORP measures the cleanliness of the water and its ability to break down contaminants. It has a direct relationship with the water’s bacteria-killing ability. PPM, on the other hand, is a measure of concentration in the water. The conversion from ORP to PPM is not straightforward as it depends on the specific contaminant in question. However, generally, a higher ORP value corresponds to a lower PPM of contaminants, indicating cleaner water.

How to Calculate Orp To Ppm?

The following steps outline how to calculate the Orp To Ppm using the formula: PPM = ORP / K.

  1. First, determine the ORP (Oxygen Reduction Potential) value (mV).
  2. Next, determine the conversion factor (K) value (mV/PPM).
  3. Next, gather the formula from above = PPM = ORP / K.
  4. Finally, calculate the concentration in parts per million (PPM).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

ORP (Oxygen Reduction Potential) = 150 mV

Conversion factor (K) = 0.5 mV/PPM